Tandem-spring draft-rigging.



J. R. MTGHBLL.

TANDEM SPRING DRAFT RIGGUNG.v

APPLICATION FILED JN.1G, 1911.

latemed; Mai. i8, 1913.

2 SEBETS-SHEET 1.

WITNESSES:

J. R. MITCHELL.

TANDEM SPRING DRAFT RIGGING.

APPLI-OATION FILED 11111.16, 1911.

1,056,200. Patented Mar. 18, 1913.

2 SHEETS-SHEET Z.

(D ff) gl :ssss INVENTon Jorrit Miroirs-iin, orv einen 'heretofore inuse;` in Which the center jdraft timbers or other draft members of thel"car frame to `Whieh`the side places or stop 'castings are securedmaybe centrally and Improvement in Tandem-Spring Draft-Rig- "glug,

ofwhich the following isa specification.

AMy invention relates to improvements in draft rigging forrailway ears.

The. object of my invention is to provide an improved construction oftandem spring vdraft rigging by means of which the intermediatethimbleor abutment block which is secured to the upper and lower limbs of thedraft yoke for-engagement with the two intermedate followers of thetandem spring` dra-ft rigging may be more securely fixed to the draft'yoke than in the constructions eiiciently- KYtied 'together andreinforced 'against-danger of buckling or breakage; and p by `which thebottom' tie-plate which heretofore customarily has been secured to thelower edges of the sideplates or stop east 4 ingsfmay lbe dispensed Withand the draft rigging as a'wholejsimplifed inconstrue- "tion,"fand atthesalme` time rendered eX- .tremely strong, emcient and durable.

fMy invention consists in the means l ploy to practically' accomplishthis object or result, as herein shown and described and moreparticularly specified in the claims.

- y In the accompanying drawing forming a part of this specification,Figure 1 is a cen- "trol," horizontal' section of a tandem spring'draftv` rigging embodying my invention.

Fig. 2 is a vertical, llmzffitudinal section. on line 2,-2 of Fig. 1;ig. 3 is a cross section on line 3 3 of if 1. F ig. e is a detailperspective viewv if the. intermediate thimble or abutment'bl'eck of thedraft. yoke. Fig. 5 is a detail vertical section illustrating amodification. Fig. 6 is a cross section on line 6-6 of Fig. 5. Fig. 7 isa detail, vertical, longitudinal section, showing a furthermodification, and Fig. S is a vertical section on line 8-8 of Fig. 7.Fig. 9 is a detail, perspective view of the thimble or abutment blockshown in Figs. 7 and 8.

In the drawing, 1 represents the center 55 sills, draft timbers or otherdraft members 1` rnnnnrtsr'nrne# nnlrruareerire.

sills,`

l .Speciale-ation ofietters l l -Igjnljad is, fitug Application filedJanuary 1S, 1811. i

Serial No. 602,838.

of the car frame to which the side plates, clieek'plates or stop members2 are secured by bolts 8, which pass through bearing bars or plates l onthe upright outer lfaces of the draft members 1. The stopv members 2havemain stops 5, 6, 7 and 8 for the followers to abut against and alsolimiting stops or shoulders 9. 10, 11, 12, which, by engagement with thefollowers, limit the eX- tent to which the tandem springs 13, 14. and15, 16 may be compresse 17 is the draw-bar, 18 the draft yoke having thecustomary upper and lower limbs 19 and 20 and secured to the draw-bar byrivets 21 and interengagng gibs 22 on the draft yoke and shoulders 23,24 on the dravvbar.

25, 26, 27 and 28 are the followers extending horizontally through thedraft yoke and adapted to engage the main and limiting stop shoulders ofthe stop members or cheek plates 2. The front follower abut-s againstthe rear end of the dran/'bar and the rear follower' 28 is actuated bythe draft yoke or the filler plate 2S at its rear end.

8O is the intermediate thimble or abut-- ment `block which tits betweenand actuates thel tivo intermediate followers 26, 2'?. This intermediatethimble 80 is preferably of a general Z `shape and is provided withhorizontal Webs or `members 31, 32 which t against the upper and lowerlimbsl9, 20 of the draft yoke and are adapted to be very firmlyandlsecurely connected together by short rivets 33 which extend simplythrough the limb of the draft yoke and the 31, 32 of the thimble, inconnection with, the.

diagonally extending member 84: of the thimble form notches or slots 35to ,receive and accommodate central tie rods 36,. 87, one just beneaththe upper leg 31/of the thimble and theother just above the lowerhorizontal leg 32 of thethimble, and both of which extend through thecenter sills, dra-ft timbers or draft members 1, 1v of the car frame andthus serve to centrallyV tie the same together and prevent all danger oftheir buckling or breaking under the enormous strains to which they aresubjected in the practical use of the draft rigging,

The ties or rods 36, 37 extend through diagonally arranged bearingbarsor plates 38 which fit on the outer upright faces of lll@ l thedraft members l, 1l. rll`he central ties or draft member connecting rods36, 37 also serve or may serve to support the draft rigging between thedraft members l, l and thus enable me nto entirely dispense with thecustomary bottom tie plate which heretofore has been removably attachedto the lower edges of the stop castings or cheek plates 2, 2. Thecentral ties or connecting rods 36, 37 between the draft members 1, 1are preferably furnished with threaded nuts 39 and keys or cotters Zl()at each end.

vThe slots or notches 35 in the intermediate thimble 30 permit thedraw-bar, draft yoke and connecting thimble 30 to move back and forthlongitudinally as required. These horizontal and longitudinallyextending slots or notches B5 being each open at one end, also permitthe draft rigging to be removed from the center s by simply removing thelower rem. fable longitudinally extending guides atl, il from the stopcastings or cheek plates 2 and removing the tie rods 3G, 37.

In the construction shown in Figs, 5 and 6 and t), the lower removableguides 41, 41 of the cheek plates or stop castings 2 are omitted and thecentrabtie rods 36, 317 are alone employed to support the draft riggingbetween the draft members l, l of the car frame. As shown in thesegures, the slots or notches 35 are formed with parallel upper and lowerwalls and the intermediate thimble is provided with upper and lowerhorizontal flanges 42 and give a more extended bearing against thetransverse tie rods 36, 37.. 4

In the modified construction shown in Figs. 7 and 8, the tie rods 36, 37are surrounded by spacer thimbles or sleeves 4:3 which serve to protectthe tie rods from wear as the draft yoke and its intermediate thimble 30reciprocate back and forth the sleeves 43 also serving as anti-frictionrollers.

I claim l. In a tandem spring draft rigging, the combination with thedraft members of a car frame, and stop members secured thereto, of adraw-bar, draft yoke, tandem arranged springs and followers, of anintermediate thimble extending between the uper and lower limbs of thedraft yoke and aving upper and lower .horizontally extending webssecured to the upper and lower limbs of the draft yoke by short rivets,each extending through one of said webs and one extending through one ofsaid webs and one innesco limb of the draft yoke, and central tie rodsextending through the draft members of the car frame and the stopmembers secured thereto and said intermediate thimble, said intermediatethimble having longitudinal slots to receive and accommodate saidcentral tie rods and permit the draw-bar and draft yoke to move back andforth as required, each of said tie rods being normally located adjacentan end of a web, substantially as specified.

' 2. In a tandem spring draft rigging, the combination with the draftmembers of the car frame and stop members secured thereto, of adraw-bar, draftl yoke, tandem als' ranged springs and followers, of anintermediate thimble secured to the draft yoke and provided withlongitudinally Aextending slots to receive and accommodate` central tierods, and central tie rods extending through the draft members of thecar frame, substantially as specified.

3. In a tandem spring draft rigging, the combination with the raftmembers of a car frame and stop members secured thereto, of a draw-bar,draft yoke, tandem arranged springs and followers, of an intermediatethimble extending between the upper and lower limbs of thedraft yoke andhaving upper and lower horizontally extending webs secured to the upperand ower limbs of the draft .yoke .by short rivets, each limb of thedraft yoke, said intermediate thimble being of a general Z shape andhaving upper and lower slots adapted to receive and accommodatetransversely extending central tie rods of the draft members,substantially as specified. p

4. In a draft rigging, a draft yoke having an intermediate single piecethimblehaving portions secured to both limbs of the yoke and providedwith a longitudinally extending slot to receive a transversel extendingtie rod, substantially as specie 5. In a draft rigging, a draft yokehaving an intermediate thimble secured thereto an provided withalongitudinally extending slotto receive a transversely extending tierod, said thimble having horizontal anges at the upper and lower edgesof said slot, substantially as specied.

JOHN R. MITCHELL.

Witnesses:

Ennemi ncocx, H, M, Muneer..

